my son is a student of class 3,from school he heard some slang language ,some of his friends used those,he asked me the meaning,,,how should I respond?

A. Okay now depends what is the slang we are talking about so you can just tell your child that it is not a good word and when you grow up you will get to know the meaning but as of now you should not learn these things you should not repeat these things I know for every word you cannot express the meaning but you have to find other way out to comfort your child